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Nondestructive measurement of cross-sectional shape of a tree trunk
Title: | Nondestructive measurement of cross-sectional shape of a tree trunk |
Authors: | Koizumi, Akio Browse this author | Ikeda, Keisuke Browse this author | Sawata, Kei Browse this author | Hirai, Takuro Browse this author |
Keywords: | nondestructive evaluation | section modulus | windthrow resistance | tree trunk | drill resistance technique |
Issue Date: | Aug-2011 |
Publisher: | Springer |
Journal Title: | Journal of Wood Science |
Volume: | 57 |
Issue: | 4 |
Start Page: | 276 |
End Page: | 281 |
Publisher DOI: | 10.1007/s10086-011-1174-1 |
Abstract: | To evaluate windthrow resistance with respect to stem breakage, a nondestructive method for determining the shape of trunk cross sections was developed. In this method, the coordinates of multiple gauge points set on the perimeter of a trunk are calculated by measuring the distances between them. The shape between the gauge points is generated with the use of a profile gauge placed between them. Measurement tests were conducted using profile gauges with lengths of 300 and 900 mm on model specimens with four shape patterns and four different diameters. The accuracy of the estimation was verified by comparing the section modulus calculated for the generated image and for the photograph. The average ratio of section modulus (generated/photo) for all specimens was 0.994, which indicates that the proposed method is highly accurate. The section moduli of hollow trunks can be evaluated using the profile method together with the drill resistance technique on the condition that 26% of the trunk diameter could be drilled without skew. |
Rights: | The original publication is available at www.springerlink.com |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/47097 |
Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 小泉 章夫
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